| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.yarn.state; |
| |
| import java.lang.reflect.Field; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| |
| @Private |
| public class VisualizeStateMachine { |
| |
| /** |
| * @param classes list of classes which have static field |
| * stateMachineFactory of type StateMachineFactory |
| * @return graph represent this StateMachine |
| */ |
| public static Graph getGraphFromClasses(String graphName, List<String> classes) |
| throws Exception { |
| Graph ret = null; |
| if (classes.size() != 1) { |
| ret = new Graph(graphName); |
| } |
| for (String className : classes) { |
| Class clz = Class.forName(className); |
| Field factoryField = clz.getDeclaredField("stateMachineFactory"); |
| factoryField.setAccessible(true); |
| StateMachineFactory factory = (StateMachineFactory) factoryField.get(null); |
| if (classes.size() == 1) { |
| return factory.generateStateGraph(graphName); |
| } |
| String gname = clz.getSimpleName(); |
| if (gname.endsWith("Impl")) { |
| gname = gname.substring(0, gname.length()-4); |
| } |
| ret.addSubGraph(factory.generateStateGraph(gname)); |
| } |
| return ret; |
| } |
| |
| public static void main(String [] args) throws Exception { |
| if (args.length < 3) { |
| System.err.printf("Usage: %s <GraphName> <class[,class[,...]]> <OutputFile>%n", |
| VisualizeStateMachine.class.getName()); |
| System.exit(1); |
| } |
| String [] classes = args[1].split(","); |
| ArrayList<String> validClasses = new ArrayList<String>(); |
| for (String c : classes) { |
| String vc = c.trim(); |
| if (vc.length()>0) { |
| validClasses.add(vc); |
| } |
| } |
| Graph g = getGraphFromClasses(args[0], validClasses); |
| g.save(args[2]); |
| } |
| } |